/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: #333;
}

/* Flex工具类 */
.flex {
    display: flex;
}

.flex-column {
    display: flex;
    flex-direction: column;
}

.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
}

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.flex-around {
    display: flex;
    justify-content: space-around;
    align-items: center;
}

.flex-wrap {
    display: flex;
    flex-wrap: wrap;
}

.justify-center {
    justify-content: center;
}

.align-center {
    align-items: center;
}

.w1200 {
    width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.mt30 {
    margin-top: 30px;
}

.mt20 {
    margin-top: 20px;
}